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Omron Sysmac NJ-series - Communications Performance and Communications Load

Omron Sysmac NJ-series
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14-1
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
14
14-1 Communications System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2
14-1-1 Tag Data Link Communications Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2
14-1-2 Calculating the Number of Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-4
14-1-3 Packet Interval (RPI) Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-5
14-2 Adjusting the Communications Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-6
14-2-1 Checking Bandwidth Usage for Tag Data Links . . . . . . . . . . . . . . . . . . . . . . . 14-7
14-2-2 Tag Data Link Bandwidth Usage and RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-8
14-2-3 Adjusting Device Bandwidth Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-9
14-2-4 Changing the RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-11
14-2-5 RPI Setting Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-17
14-3 I/O Response Time in Tag Data Links . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-22
14-3-1 Timing of Data Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-22
14-3-2 Built-in EtherNet/IP Port Data Processing Time . . . . . . . . . . . . . . . . . . . . . 14-23
14-3-3 Relationship between Task Periods and Packet Intervals (RPIs) . . . . . . . . 14-25
14-3-4 Maximum Tag Data Link I/O Response Time . . . . . . . . . . . . . . . . . . . . . . . 14-26
14-4 Message Service Transmission Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-28
Communications Performance
and Communications Load

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